The ancients often gained something by looking at the heaven and earth, mountains and rivers, vegetation, insects, fish, birds and beasts. If the enemy is close, there will be many tourists; if the danger is far, there will be few tourists. The grandeur, weirdness, and extraordinaryness of the world often lie in the dangers and distances, and they are rarely accessible to people, so only those who are determined cannot reach them.

Yu Yufu’s stele, and the fact that the ancient book of the husband does not exist, and that later generations will misrepresent it and cannot be named, how can it be the best way! Therefore, scholars should not take it carefully without thinking deeply.